Practice Additional Practice Questions (1.10) - Unit 1: Stoichiometric Relationships

Practise this section

10 questions

Flashcard drill
4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is the empirical formula for a compound containing 50.0% carbon and 50.0% hydrogen?
Show hintHide hint
Convert grams to moles for C and H.
Question 2.
Balance the equation: H₂ + O₂ → H₂O.
Show hintHide hint
Start by balancing the oxygen first.
3Question 3.
What is the empirical formula of a compound containing 40% sulfur and 60% oxygen?
Show hintHide hint
Convert mass percentages to moles.
4Question 4.
True or False: The molecular formula can be the same as the empirical formula.
Show hintHide hint
Consider the simplest forms.
Question 5.
A sample contains 2.00 g of a compound with 48.37% carbon, 7.42% hydrogen, and 44.21% oxygen. Determine the empirical and molecular formulas assuming a molar mass of 88.00 g/mol.
Show hintHide hint
Remember to convert masses to moles and simplify.
Question 6.
A school laboratory uses a 10.0 M HCl solution and needs to prepare 500 mL of a 1.0 M solution for experiments. How much concentrated acid is needed?
Show hintHide hint
Make sure your units match (liters to mL).

6 more questions in this section. Enroll free to practise them all.